Used as a key intermediate in the synthesis of β-lactam antibiotics, particularly in the preparation of penem and carbapenem classes. Its strained azetidinone ring serves as a core scaffold for constructing the β-lactam pharmacophore, which is essential for antibacterial activity. The tert-butyl carbamate (Boc) protecting group stabilizes the nitrogen during multi-step syntheses and can be easily removed under mild acidic conditions, allowing further functionalization. This compound is valuable in medicinal chemistry for developing novel antibiotics with broad-spectrum activity against resistant bacterial strains.